MKR Sharky


Platform ST STM32: The STM32 family of 32-bit Flash MCUs based on the ARM Cortex-M processor is designed to offer new degrees of freedom to MCU users. It offers a 32-bit product range that combines very high performance, real-time capabilities, digital signal processing, and low-power, low-voltage operation, while maintaining full integration and ease of development.

Microcontroller STM32WB55CG
Frequency 64MHz
Flash 512KB
RAM 192.00KB
Vendor Midatronics


Please use mkr_sharky ID for board option in “platformio.ini” (Project Configuration File):

platform = ststm32
board = mkr_sharky

You can override default MKR Sharky settings per build environment using board_*** option, where *** is a JSON object path from board manifest mkr_sharky.json. For example, board_build.mcu, board_build.f_cpu, etc.

platform = ststm32
board = mkr_sharky

; change microcontroller
board_build.mcu = stm32wb55cg

; change MCU frequency
board_build.f_cpu = 64000000L


MKR Sharky supports the next uploading protocols:

  • blackmagic
  • cmsis-dap
  • dfu
  • jlink
  • mbed
  • serial

Default protocol is mbed

You can change upload protocol using upload_protocol option:

platform = ststm32
board = mkr_sharky

upload_protocol = mbed


Debugging - “1-click” solution for debugging with a zero configuration.


You will need to install debug tool drivers depending on your system. Please click on compatible debug tool below for the further instructions and configuration information.

You can switch between debugging Tools & Debug Probes using debug_tool option in “platformio.ini” (Project Configuration File).

MKR Sharky does not have on-board debug probe and IS NOT READY for debugging. You will need to use/buy one of external probe listed below.

Compatible Tools On-board Default
Black Magic Probe   Yes


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